Spatial Linearity Improvement for Discrete Scintillation Imagers

Details Spatial Linearity Improvement for Discrete Scintillation Imagers Spatial Linearity Improvement for Discrete Scintillation Imagers

Apr 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006apsp.conf..715m&link_type=abstract

ASTROPARTICLE, PARTICLE AND SPACE PHYSICS, DETECTORS AND MEDICAL PHYSICS APPLICATIONS . Proceedings of the 9th Conference . Held

Physics

Medical Physics

Scientific paper

In principle, a scintillation imager made by a crystal array and a position-sensitive photomultiplier shows spatial non linearities at borders due to the undersampling of scintillation light distributions. To improve the response of such detectors a method has been carried out based on the comparison between experimental and simulated images. A computer simulation code has been developed and used to foresee the imager response. The code computes the tapered charge-weighting factors giving the optimized event centroiding in terms of crystal-pixel identification. The comparison between measured centroids and crystal axes produces the effective correction table for image linearization. Experimental results concerning a 8×8 crystal array coupled to a position sensitive photomultiplier tube (1 inch square) are presented and discussed.

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